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- <?php
- namespace Drupal\Core\Entity;
- use Drupal\Core\Field\FieldStorageDefinitionInterface;
- /**
- * Defines an interface for managing entity definition updates.
- *
- * During the application lifetime, the definitions of various entity types and
- * their data components (e.g., fields for fieldable entity types) can change.
- * For example, updated code can be deployed. Some entity handlers may need to
- * perform complex or long-running logic in response to the change. For
- * example, a SQL-based storage handler may need to update the database schema.
- *
- * To support this, \Drupal\Core\Entity\EntityManagerInterface has methods to
- * retrieve the last installed definitions as well as the definitions specified
- * by the current codebase. It also has create/update/delete methods to bring
- * the former up to date with the latter.
- *
- * However, it is not the responsibility of the entity manager to decide how to
- * report the differences or when to apply each update. This interface is for
- * managing that.
- *
- * This interface also provides methods to retrieve instances of the definitions
- * to be updated ready to be manipulated. In fact when definitions change in
- * code the system needs to be notified about that and the definitions stored in
- * state need to be reconciled with the ones living in code. This typically
- * happens in Update API functions, which need to take the system from a known
- * state to another known state. Relying on the definitions living in code might
- * prevent this, as the system might transition directly to the last available
- * state, and thus skipping the intermediate steps. Manipulating the definitions
- * in state allows to avoid this and ensures that the various steps of the
- * update process are predictable and repeatable.
- *
- * @see \Drupal\Core\Entity\EntityManagerInterface::getDefinition()
- * @see \Drupal\Core\Entity\EntityManagerInterface::getLastInstalledDefinition()
- * @see \Drupal\Core\Entity\EntityManagerInterface::getFieldStorageDefinitions()
- * @see \Drupal\Core\Entity\EntityManagerInterface::getLastInstalledFieldStorageDefinitions()
- * @see hook_update_N()
- */
- interface EntityDefinitionUpdateManagerInterface {
- /**
- * Indicates that a definition has just been created.
- *
- * @var int
- */
- const DEFINITION_CREATED = 1;
- /**
- * Indicates that a definition has changes.
- *
- * @var int
- */
- const DEFINITION_UPDATED = 2;
- /**
- * Indicates that a definition has just been deleted.
- *
- * @var int
- */
- const DEFINITION_DELETED = 3;
- /**
- * Checks if there are any definition updates that need to be applied.
- *
- * @return bool
- * TRUE if updates are needed.
- */
- public function needsUpdates();
- /**
- * Gets a human readable summary of the detected changes.
- *
- * @return array
- * An associative array keyed by entity type id. Each entry is an array of
- * human-readable strings, each describing a change.
- */
- public function getChangeSummary();
- /**
- * Applies all the detected valid changes.
- *
- * Use this with care, as it will apply updates for any module, which will
- * lead to unpredictable results.
- *
- * @throws \Drupal\Core\Entity\EntityStorageException
- * This exception is thrown if a change cannot be applied without
- * unacceptable data loss. In such a case, the site administrator needs to
- * apply some other process, such as a custom update function or a
- * migration via the Migrate module.
- */
- public function applyUpdates();
- /**
- * Returns an entity type definition ready to be manipulated.
- *
- * When needing to apply updates to existing entity type definitions, this
- * method should always be used to retrieve a definition ready to be
- * manipulated.
- *
- * @param string $entity_type_id
- * The entity type identifier.
- *
- * @return \Drupal\Core\Entity\EntityTypeInterface
- * The entity type definition.
- */
- public function getEntityType($entity_type_id);
- /**
- * Installs a new entity type definition.
- *
- * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
- * The entity type definition.
- */
- public function installEntityType(EntityTypeInterface $entity_type);
- /**
- * Applies any change performed to the passed entity type definition.
- *
- * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
- * The entity type definition.
- */
- public function updateEntityType(EntityTypeInterface $entity_type);
- /**
- * Uninstalls an entity type definition.
- *
- * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
- * The entity type definition.
- */
- public function uninstallEntityType(EntityTypeInterface $entity_type);
- /**
- * Returns a field storage definition ready to be manipulated.
- *
- * When needing to apply updates to existing field storage definitions, this
- * method should always be used to retrieve a storage definition ready to be
- * manipulated.
- *
- * @param string $name
- * The field name.
- * @param string $entity_type_id
- * The entity type identifier.
- *
- * @return \Drupal\Core\Field\FieldStorageDefinitionInterface
- * The field storage definition.
- *
- * @todo Make this return a mutable storage definition interface when we have
- * one. See https://www.drupal.org/node/2346329.
- */
- public function getFieldStorageDefinition($name, $entity_type_id);
- /**
- * Installs a new field storage definition.
- *
- * @param string $name
- * The field storage definition name.
- * @param string $entity_type_id
- * The target entity type identifier.
- * @param string $provider
- * The name of the definition provider.
- * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
- * The field storage definition.
- */
- public function installFieldStorageDefinition($name, $entity_type_id, $provider, FieldStorageDefinitionInterface $storage_definition);
- /**
- * Applies any change performed to the passed field storage definition.
- *
- * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
- * The field storage definition.
- */
- public function updateFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);
- /**
- * Uninstalls a field storage definition.
- *
- * @param \Drupal\Core\Field\FieldStorageDefinitionInterface $storage_definition
- * The field storage definition.
- */
- public function uninstallFieldStorageDefinition(FieldStorageDefinitionInterface $storage_definition);
- }
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